There is my configuration - it's work ok (from internal and from external).
How protokol dialed from external? Sip or h.323?
Maybe you do this:
voice service voip allow-connections h323 to sip allow-connections sip to h323
ip cef no ip dhcp use vrf connected ip dhcp excluded-address 192.168.1.1 192.168.1.20 ! ip dhcp pool IpPhone network 192.168.1.0 255.255.255.0 default-router 192.168.1.250 option 150 ip 192.168.1.250 option 66 ascii 192.168.1.250
ip multicast-routing no ipv6 cef ! multilink bundle-name authenticated ! ! ! ! ! ! voice call send-alert voice call disc-pi-off voice rtp send-recv ! voice service voip address-hiding allow-connections h323 to sip allow-connections sip to h323 allow-connections sip to sip no supplementary-service h450.2 no supplementary-service h450.3 supplementary-service h450.12 no supplementary-service sip moved-temporarily no supplementary-service sip refer redirect ip2ip sip registrar server ! voice class codec 1 codec preference 1 g711ulaw codec preference 2 g711alaw codec preference 3 g729r8 codec preference 4 g726r16 codec preference 5 g726r24 codec preference 6 g726r32 ! !
voice register global mode cme source-address 192.168.1.250 port 5060 max-dn 144
voice register pool 1 id mac 000E.083A.2FA3 type 7906 number 1 dn 1 presence call-list dtmf-relay rtp-nte sip-notify voice-class codec 1 username 400 password 400 no vad blf-speed-dial 1 400 label "400" ! voice register pool 2 id mac 0019.306F.A30A type 7906 number 1 dn 2 presence call-list dtmf-relay rtp-nte sip-notify voice-class codec 1 username 401 password 401 no vad blf-speed-dial 1 401 label "401" ! voice register pool 3 id mac 0014.0B0C.2A7E number 1 dn 3 presence call-list dtmf-relay rtp-nte sip-notify voice-class codec 1 username 402 password 402 no vad blf-speed-dial 1 402 label "402"
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